Amabhizinisi anwebisile ukukhiqizwa, ama-oda akhuphuke ngasikhathi sinye futhi adale ukuhlinzekwa kwezinto zokwenziwa, ikakhulukazi i-Pbat, ama-PB kanye nezinye izinto ezingokwenele zesikhwama se-membrane ezinyangeni ezi-4 kuphela, intengo yakhuphuka. Ngakho-ke, impahla ye-PLA enentengo ezinzile idonsele ukunakwa.
I-Poly (i-lactic acid) (PLA), eyaziwa nangokuthi i-poly (lactide), iyisimo esisha se-polymer esitholakala nge-polymerization etholwa i-polymerization ye-lactic acid elungiselelwe kusuka ku-biologi acid elungiselelwe kusuka emndenini we-biology, futhi ingadedelwa ngokuphelele ibe nobungane bemvelo Imikhiqizo yokugcina, njenge-CO2 ne-H2O.
Ngenxa yezinzuzo zayo zamandla aphezulu emishini, ukucubungula okulula, indawo ephezulu yokuncibilika, i-biodegladability kanye nokuqina okuhle, kusetshenziswe kabanzi kwezolimo, ukupakishwa kokudla, ukunakekelwa kwezokwelapha kanye nezinye izinkambu. Utshani obunokonakalayo buthole ukunakwa kakhulu eminyakeni yamuva.
Ephendula i-oda le-ban yepulasitiki, utshani bephepha busetshenziswa kabanzi eChina. Kodwa-ke, utshani bephepha bugxekwa kabanzi ngomuzwa wabo ongemuhle wokusebenzisa. Abakhiqizi abaningi ngokwengeziwe baqala ukukhetha izinto eziguquliwe ze-PLA ukukhiqiza utshani.
Kodwa-ke, yize i-polylactic acid inezakhiwo ezisebenza kahle zemishini, ukugcwala kwayo okuphansi ngekhefu (imvamisa ngaphansi kwe-10%) nokulimala kabi kukhawulela ukusetshenziswa kwayo ku-STRICS.
Ngakho-ke, i-PLA enamandla iye yaba yisihloko sokucwaninga esishisayo njengamanje. Okulandelayo inqubekela phambili yamanje yocwaningo lwe-PLA olunamandla.
I-Poly - i-lactic acid (PLA) ingenye yamapulasitiki avuthiwe avuthiwe. Izinto zayo ezingavuthiwe zivela kwimicu yezitshalo evuselelekayo, ummbila, imikhiqizo yezolimo, njll, futhi ine-biodegrade enhle. I-PLA inezindawo ezinhle kakhulu zemishini, ezifanayo ne-polypropylene plastistics, futhi ingabeka esikhundleni se-PP kanye nezinsimbi zezilwane kwezinye izinkambu. Ngaleso sikhathi, i-PLA ine-gloss enhle, ukucaca, ukuzizwa kwandla kanye nezakhiwo ezithile ze-antibacterial
Isimo Sokukhiqiza se-PLA
Njengamanje, i-PLA inezindlela ezimbili zokwenziwa. Enye i-polymerization eqondile, ie i-lactic acid ikhishwe emanzini ngokuqondile futhi ihlehliswe ngaphansi kokushisa okuphezulu kanye nengcindezi ephansi. Inqubo yokukhiqiza ilula futhi izindleko ziphansi, kepha isisindo samangqamuzana somkhiqizo asilingani, futhi umphumela wohlelo lokusebenza olusebenzayo alumpofu.
Okunye yindandatho ye-lactide - ukuvula i-polymerization, okuyimodi yokukhiqiza ejwayelekile.
Ukuwohloka kwe-pla
I-PLA iqinile emazingeni okushisa asekamelweni, kepha ilimaza kalula ku-CO2 namanzi endaweni yokushisa ephakeme, imvelo enesisekelo se-acid kanye nemvelo ye-microbial. Ngakho-ke, imikhiqizo ye-PLA ingasetshenziswa ngokuphepha ngaphakathi kwesikhathi sokuqinisekiswa futhi yahlaselwa ngesikhathi ngemuva kokulahlwa ngokulawula imvelo nokupakisha.
Izici ezithinta ukucekelwa phansi kwe-PLA ikakhulukazi zifaka isisindo se-molecular, isimo se-crystalline, i-microskructure, izinga lokushisa le-adient kanye nomswakama, isikhathi sokukhanyisa, isikhathi sokukhanyisa kanye nama-microorganisms wezemvelo.
I-PLA nezinye izinto zokwakha kungathinta isilinganiso sokuwohloka.
Isibonelo, i-PLA yengeza inani elithile lefulawa yezinkuni noma i-corn stalk fiber ingasheshisa kakhulu isilinganiso sokuwohloka.
Pla Barrier ukusebenza
Ukufakwa kubhekisele emandleni okuqukethwe ukuvikela ukudlula kwegesi noma umphunga wamanzi.
Impahla yesithiyo ibaluleke kakhulu ekupakisheni izinto zokwakha. Njengamanje, isikhwama sepulasitiki esivame kakhulu esibonakalayo emakethe yizinto ezibonakalayo ze-PLA / PBAT.
Izakhiwo zesithiyo zefilimu ye-PLA ethuthukisiwe zingandisa inkambu yesicelo.
Izici ezithinta impahla yokubamba i-Pla Barrerier ikakhulukazi zifaka izinto zangaphakathi (Isakhiwo se-molefanelar kanye nombuso we-crystallization) nezinto zangaphandle (izinga lokushisa, umswakama, amandla angaphandle).
1. Ukushisa i-PLA fil fil film kuzonciphisa impahla yayo yesithiyo, ngakho-ke i-PLA ayilungele ukufakwa kokudla okudinga ukufudumeza.
2. Ukunwebeka kwe-pla ebangeni elithile kungakhulisa impahla yesithiyo.
Lapho isilinganiso se-Tensile sikhuphuka sisuka ku-1 kuye ku-6.5, i-Crystallity of Pla yanda kakhulu, ngakho-ke impahla yesithiyo iyathuthuka.
3. Ukungeza ezinye izithiyo (ezinjenge-Clay ne-fiber) ku-Matrix yePla Matrix kungathuthukisa impahla yesithiyo sepla.
Lokhu kungenxa yokuthi umgoqo udlulisa indlela elukiwe yenqubo yamanzi noma yegesi ye-permonity yama-molekyuli amancane.
4. Ukwelashwa okukhokhisa ebusweni befilimu ye-PLA kungathuthukisa impahla yesithiyo.
Isikhathi Seposi: 17-12-21